US4200413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipelining particulate solid material as stable foam slurry
Assignee: Mobil Oil AS
•
Filing: 1977-11-14
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Granted: 1980-04-29
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Expires: 1997-11-14
Abstract
Abstract A method of transporting particulate solid material through a pipeline in the form of a stable foam slurry. There is formed a pumpable slurry of the particulate solid material in a stable foam carrier medium and the slurry is flowed through the pipeline to a receiving point.
Inventors
- 👤 John L. Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:58
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
A method of transporting particulate solid material through a pipeline, comprising: (a) mixing a first portion of said particulate solid material with an aqueous liquid to form a liquid slurry thereof; (b) pumping said liquid slurry though a first conduit; (c) injecting into said first conduit at a first injection point and into said liquid slurry a foaming agent selected from the group consisting of surfactants and soaps; (d) injecting into said first conduit at a second injection point downstream of said first injection point and into said liquid slurry a gas in an amount sufficient to form a pumpable stable foam slurry; (e) injecting a second portion of said particulate solid material into said first conduit downstream of said second injection point and into said pumpable stable foam slurry; and (f) pumping said pumpable stable foam slurry containing said particulate solid material through said pipeline.
Claim 2
Independent Claim
146 words
A method of transporting particulate solid material through a pipeline, comprising: (a) mixing a first portion of said particulate solid material with an aqueous liquid to form a liquid slurry thereof; (b) pumping said liquid slurry though a first conduit; (c) injecting into said first conduit at a first injection point and into said liquid slurry a foaming agent selected from the group consisting of surfactants and soaps; (d) injecting into said first conduit at a second injection point downstream of said first injection point and into said liquid slurry a gas in an amount sufficient to form a pumpable stable foam slurry; (e) injecting a second portion of said particulate solid material into said first conduit downstream of said second injection point and into said pumpable stable foam slurry; and (f) pumping said pumpable stable foam slurry containing said particulate solid material through said pipeline.
Claim 3
Dependent Claim
69 words
The method of claim 1 wherein in step (c) gas is injected into said first conduit in an amount sufficient to form a pumpable stable foam slurry of a quality of at least 52 percent, and wherein in step (f) said pumpable stable foam slurry is pumped through said pipeline at a pressure sufficient to maintain said pumpable stable foam slurry at a quality of at least 52 percent.
Claim 4
Dependent Claim
24 words
The method of claim 2 wherein said particulate solid material is coal of a size within the range of about 100 to 325 mesh.
Claim 5
Dependent Claim
37 words
The method of claim 3 wherein said coal is present in said stable foam slurry in an amount within the range of about 20 to 55 volume percent based on the volume of said stable foam slurry.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |